Section-insulator.



G. B. ELY.

SECTION INSULATOR.

APPLICATION nuan MAR.13. 1916.

Patented]. Dec. 11, 1917,

INVENTOR ATTORNEY enonen 'B. ELY,OT 'ELK1-I.RT,INDIANA, Assie'noa r0w-esrmeirousn ELEc'rRI'c -& MANUFACTURING COMPANY, A oonroaaer'ro v orPENNSYLVANIA.

SECTIONJNSULA'IOR.

masses.

Specification of LetteTSratent.

Patented net. 11, ieit.

Application iiled March 13, 19 16. 'Seria1No. 83,750.

To all to boot "it may concern.

Be it known that I, GEORGE E. ELY, a citizen of the United States, and aresident of Elkhart, in the county of Elkhartand State of Indiana, haveinvented anew anduseful Improvement in Section Insulators,of which thefollowing is a specification.

My invention relates to overhead construction for electric trolley linesand it has spe cial relation to section insulators for use in connectionwith'trolley lines that are operated under high voltages and inconnection with high-speed sliding or pantograph trolle s.

The object of my invention is to improve the construction of sectioninsulators of the above indicated character and, in particular, toprovide such an insulator in which the insulating member may be readilyreplaced without changing any of the connections to the adjacent trolleysections or glider attachments.

In the accompanyingdrawing, Figure l is a side elevational view of asection insulator constructed in accordance with, my invention, and Fig.2 is a plan view of the apparatus shown in Fig. 1.

A sectioninsulator of the type to which my present invention relatesconsists essentially of a strip ofwood or other insulating materialprovided with connecting "means at its opposite ends for attachment toadjacent trolley conductor sections. It is also usual to provide arms orgliders that extend obliquely outward from opposite ides of theinsulator, these gliders being designed to afford a continuousconducting path for the pantograph as it traverse the insulator. It hasheretofore been customary to attach such gliders, and also the ends ofthe adjacent trolley conductor sections, directly to castings secured tothe ends of the insulating strip. When an insulator constructed in thismanner is in need of repairs or replacement, considerable time and laborare required to disconnect the insulator from the trolley sections andto make the necessary attachments to restore the insulator to itsoperative condition.

According to my present invention, the trolley conductors and glidersare not directly attached to the insulating member, but are secured toconnecting members that releasably engage the end castings of the i slar er by m ans at hea s Q desires The insulator shown in theaccompanying drawii'ig consists of an insulating strip 1, 01' Wood orother non-conducting material, to which are bolted end castings 2 and 3,each of these castings being. provided with two outwardly extending earsl which are perforated to 1 receive a transverse bolt 5.

Cooperating with eachofthe end castings just described is a connectingmember 6 provid'ed with a hook 7 which engages the bolt "5 and, when thedevice is under tension, serves to hold the insulator in plate.

The member 6 1s forked and i perforated to receive transverse bolts 8, 9and 10. The

bolts"8 and 9 are adapted to receive con necward'ly, as shown in Fig. 2.The weight of the glider 14 is supported by means of a spring 15 theends of which are attached at 16 to the hooked connecting memberd theconnection between the glider 14: and the spring 15 being adj ustablyeffected by means of a rod 17 and clamps 18 and 19.

The shape of the guide 13 is so seleeted that free movement is permittedbetweenthe guide and the bolt 10, so that the glider 14 is permitted tomove freely against the pressure of the trolley, and the formation ofhard spots at these points is thereby avoided. The bolts 9, as shown inFig. 2, are provided with eye nuts 20 to which the usual steady spansmay be attached.

In its normal operation, my device does not differ materially from thesection insulators which have heretofore been in use. When, however,replacement or repairs are required, it is only necessary to remove thestrain of the trolley from the insulator, by means of a set of blocks orotherwise, when the insulating section can be disengaged from the hooks7 and replaced without disturbing either the trolley connections or theglider attachment-s. A considerable saving in time and labor is therebyefi'ected.

The structural details which I have shown and de cribed are those whichI have found to be advantageous for the purposes indiated, but i ste bei ederstoed th su ous modifications may be made without departing fromthe scope of my invention. It

is therefore .to be understood that no limitations are to be imposedupon my invention except such as are indicated in the appended claims. 7

I claim as my invention:

Y 1'. A section insulator for trolley con-' ductors comprising aninsulating member, and means for connecting the opposite ends of saidmember to the trolley-conductor sections, said insulatingmember being soconstructed thatit is freely removable from the structure bydrawing. theconnecting meansjtoward one another and lifting said memberverticallyfrom the structure.

2. A section insulator for trolley conductors comprising an insulatingmember and a connecting member releasablyattached to one end ofsaidinsulating member, said members being so constructed that drawing saidmembers together renders said insulating member freely removable.

' 3. A section insulator for trolley conductors comprising an insulatingmember and a connecting member provided wlth a hook for attachment tothe'said insulating member, said members being so constructed that,drawing said members together causes said hook to become disengagedfrom said insulating member and renders said insulating member freelyremovable.

Gopies of this patent may be obtained for ductors comprising aninsulating member a connecting member provided with a hook forattachment to the said insulating member and also provided with meansfor attachment to an adjacent trolley-conductor section, and a glidersupported by the said connecting means.

6. A section insulator for trolley conductors comprising an insulatingmember,

castings secured to the opposite ends of the said insulating member andprovided with transverse bars forming open eyes, and connecting memberscarrying gliders and provided with hooks for engaging the saidtransverse bars and also provided with means for attachment to adjacenttrolleyconductor sections.

-,Z. A section insulator for trolley conductors comprising an insulatingmember, castings secured to the opposite ends of said insulating member,connecting means releasably attached to said castings and adapted to besecured to an adjacent trolleyconductor section, and a glider supportedby said connecting means and independent of said insulating member.

8. A section insulator comprising an insulating member provided with endcast ings, a glider, and a connecting member interposed between atrolley-conductor section and one of said castings and releasablyengaging one of said castings, said glider being resiliently supportedby said connecting member.

In testimony whereof, I have hereunto subscribed my name this 9th day ofMan,

GEO. B. ELY.

five cents each, by addressing the Commissioner of Patents, Washington,D. 0.

